This varicose phyllidia is a small nudibranch, which I saw several times over the course of a week or so. Apart from being a lot smaller than the clumpy nudibranchs I saw a couple of months back, the varicose phyllidia has gills under the mantle skirt rather than in an exposed, wavy clump.
This one was two to three inches long. In the middle photo, the tiny white-spotted toby and small brown surgeonfish give a sense of scale.
A couple of days ago, I saw an octopus while snorkeling. It was on a vertical face of rock and when I showed up it slipped around the corner out of sight. I followed and could see it had gone into a recess there. I saw a tentacle moving and then, moments later, a round white thing appeared, a tentacle clasped around it.
I was mystified. I thought it might be the remains of an urchin or something. The white globe disappeared back into the depths. Moments later it appeared out of the side of the recess and it quickly became clear that the round white balloon was the head of another, completely white octopus. This white coloration is adopted when an octopus is feeling aggressive or threatened.
After a brief flurry of tentacles the white octopus disengaged, shot away a short distance, and changed color again as it landed on a rock. The octopus I’d first seen appeared again at the entrance of the recess. There was a little more to and fro before the evicted octopus gave up and moved away and the first octopus slipped back into the depths of the recess. My take on this was that the octopus I saw first wasn’t happy to find the other octopus in its lair and turfed it out.
The top photo shows the evicted octopus gathering itself after being run off. The second photo shows it on the move, still with the white coloration. The third photo shows the victor in the dispute, looking a little smug if I may say so.
A wave breaking on rocks creates a mass of bubbling turbulence as a shoal of Hawaiian silversides zips by beneath.
Ambon tobies are little pufferfishes that are usually found fairly close to shore. This colorful little fish is liberally covered with blue spots and lines.
Yesterday, when I was out snorkeling, I was spotted this entity hanging in the water. When I first saw it, I thought it might be a pyrosoma. I was lucky enough to see one of those last year, which I posted about here. Pyrosoma are colonies of many individual tunicates and this new sighting looked somewhat similar. But where that pyrosoma looked like a gelatinous tube with little purple dots in it, this tube was longer, thinner, and had much larger, and clearly visible, brown spots in it.
After some research, I’m pretty sure this is a chained salp. Like pyrosoma, chained salps are colonies of individuals. The individuals have a heart, gills and a spinal cord, which makes them quite advanced in evolutionary terms. They move around by pumping water through their bodies. When they form chains, the individuals in the chains communicate with electrical signals so the the chain moves in harmony.
Typically, salps are creatures of the open ocean, and not often seen in Hawaii, so I feel quite fortunate to have seen this one.
A gargantuan blenny hunkers down in a crack between two rocks.
The Hawaiian dascyllus is an endemic damselfish. I see them most often when they’re feeding, usually some way below the surface of the water. This one was a bit higher than most.
This week’s Friendly Friday challenge theme is ‘Two Ways,’ the idea being to show a photo processed in different ways or to show two photos of the same thing taken at different times in different conditions. (See more responses here.)
I’ve gone with a photo taken yesterday morning showing it before and after processing. In the water, I use a basic point-and-shoot camera in a waterproof case. I don’t use lights or a flash so I shoot mainly on auto, because if my big fingers started pushing little buttons, my subject would be halfway to Japan before I got a photo. This approach can lead to some erratic results, including the image appearing somewhat murky, but usually this can be cleaned up during processing. On this day, the visibility in the water was cloudy, but not as bad as it looks in the before photo.
For photo processing, I use an older version of Photoshop Express (PE), which is a stripped-down version of Photoshop. Using the full version would be like me driving a Ferrari to the local store – way more power and features than I need. My version of PE has a ‘haze reduction’ feature, which is a sort of automatic one-stop processing step, but I prefer to do my own adjustments.
While the two versions look quite a bit different, the change is mainly down to simple adjustments in ‘shadows and highlights’ and tweaking the tones and colors in ‘levels.’ Besides that, I removed a few of the little red flares that often occur in these underwater images, and bumped up the sharpness a hair. That’s it.
Since I follow the same routine when processing all my photos, it goes very quickly. This one was all done in 5 minutes, and the result was worth it.
Graham's Island 